Clamp for grinding-stones.



No. 743,308. I PATBNTBD NOV. 3,1903.

W. L. MESSER.

CLAMP FOR GRINDING STONES.

APPLIOATION I'ILED APR. 10, 1903.

H0 MODEL.

hi0. 'masos,

UNITED ST TES;

Patented November 3, 1903i PATENT OFFICE.

WALTER L. MESSER, OF PHILADELPHIA, (PENNSYLVANIA, ASSIGNOR 'ro ISAAC R. DAVIS, OF CAMDEN, NEW JERSEY.

CLAMP FOR GRINDING-STONES.

SPECIFICATION forming part of Letters Patent No. 743,308 dated November 3, 1903. Application and April10,1903. Serial No. 152,000. (No model.)

To all whom z lt may concern:

Be it known that I, WALTER L. MEssEE, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented new and usefulImprovements in Clamps for Grinding-Stones,

&c., of which the following is a specification.

My invention consists of a clamp for a grinding stone, wheel, &c., the same embodying a divided ring which is adapted to embrace said stone, wheel, &c., and to be closed upon and firmly grip the same.

Figure 1 represents a diametrical section of a clamp for a grinding-stone, &c., embodying my invention, said stone being also in section. Fig. 2 represents a face view of the clamping members employed.

Similar letters of reference indicate corresponding parts in the figures.

Referring to the drawings, A designates a head to be clamped to a part of a machine or other means, whereby rotary motion may be imparted to the same. In said head is the annular recess B, the outer wall of which is tapering and screw-threaded, as at O.

D designates a ring or collar which is divided diametrically and having on the back thereof the divided tongue D, which is of annular form and adapted to enter the recess B and has the outer wall tapering and screwthreaded, as at E, to conform to and engage with the similar threads 0 on the head A. On the face of said ring is the divided flange F of annular form, the inner wall G of the same being concave, tapering, or otherwise recessed and adapted to engage with the shoulder H on the side or periphery of the grinding-stone J, it being noticed that the'contact ing portions of the flange F and stone J form a dovetailed jointfor said parts, whereby said stone is prevented fromoutward displacement from said ring when in operative position. In orderto primarily engage the sections of the ring D, ,I employ the dowels K, which enter the opposite portions of said sections and cause the threads 0 of the sections to register.

The operation is as follows: The sections of the ring are separated sufficiently as to be placed over the shoulders H and then closed thereagainst. The sectional or divided tongue D is now inserted in the recess B, and its threads E engage with the threads 0 on the head A, whereby as said tongue screws into said recess the tapers of the contiguous th readed parts bring together the sections of said ring and cause the flange F thereof to close against the stone J, whereby the ring tightly grips said stone, it being evident that the degree of gripping and holding may be increased by further screwing said tongue D into said head. IVhen it is desired to remove the stone, the ring D is rotated in reverse direction,

whereby as the tongue D withdraws from the recess B the sections of said ring spread or open, and after said ring is removed from said head the sections may be entirely separated, and' so detached from the stone.

While I have used the term grindingstone, 1 include in the same emery and other wheels of grinding, abrasive, and polishing nature. Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is- 1. Aclamp for a grinding-stone consisting of a divided ring, means on said ring for em bracing the stone, and means on said ringfor engaging with the carrying-head, whereby the sections of said ring are brought together and closed upon said stone.

2. In a clamp for a grinding-stone, a diametrically-divided ring, a tongue on the back thereof havinga tapering screw-threaded por* tion adapted for engagement with a similar portion of a carrying-head and a flange on said ring opposite to said tongue adapted to embrace said stone.

3. In a clamp for a grinding-stone, a divided ring, a head adapted to carry the same, means on said head and ring for closing the sections of the latter,and a flange on said ring adapted to embrace said stone, the contiguous faces of said flange and stone being formed with a locking-joint.

4:. A clamp for a grinding-stone consisting of a divided ring, a flangeon said ring adaptedto embrace said stone, a tongue on the back of said ring having a. tapering screwthreaded portion and a carrying-head having a recess therein adapted to receive said on its periphery, the wall of said flange contongue, a wall of said recess being tapering tiguons of said shoulder being recessed to enand screw-threaded to engage with the threads gage said shoulder.

of said tongue. WALTER L. MESSER. 5 5. In a clamp for a grinding-stone, a di- Witnesses:

vided ring, the same having a flange there- JOHN A. WIEDERSHEIM on, and a grinding-stone having a shoulder S. R. CARR. 

